Air vent for a vehicle



FIG. 1 is a perspective view of the first embodiment of an air vent for a vehicle according to my novel design;

FIG. 2 is a side view thereof;

FIG. 3 is a perspective view of the second embodiment of an air vent for a vehicle according to my novel design; and,

FIG. 4 is a side view thereof.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a air vent for a vehicle, as shown and described. 